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2. According to a factory employer, the mean working time of workers in the factory is 10 hours with a standard deviation of 0.5 hours. A researcher interviewed 50% of the employees and found out that their mean working time is 12 hours with a standard deviation of 1 hour, the alpha level is 0.05. 3. A random sample of 200 students got a mean score of 70 with a standard deviation score of 5 in a knowledge test in mathematics. In the standardization of the test, u= 60 with o=10.

2. According to a factory employer, the mean working time of workers in the factory is 10 hours with a standard deviation of 0.5 hours. A researcher interviewed 50% of the employees and found out that their mean working time is 12 hours with a standard deviation of 1 hour, the alpha level is 0.05. 3. A random sample of 200 students got a mean score of 70 with a standard deviation score of 5 in a knowledge test in mathematics. In the standardization of the test, u= 60 with o=10.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 3GP
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2. According to a factory employer, the mean working time of workers in the factory is 10 hours with a standard deviation of 0.5 hours. A researcher interviewed 50% of the employees and found out that their mean working time is 12 hours with a standard deviation of 1 hour, the alpha level is 0.05. 3. A random sample of 200 students got a mean score of 70 with a standard deviation score of 5 in a knowledge test in mathematics. In the standardization of the test, u= 60 with o=10.
Transcribed Image Text:2. According to a factory employer, the mean working time of workers in the factory is 10 hours with a standard deviation of 0.5 hours. A researcher interviewed 50% of the employees and found out that their mean working time is 12 hours with a standard deviation of 1 hour, the alpha level is 0.05. 3. A random sample of 200 students got a mean score of 70 with a standard deviation score of 5 in a knowledge test in mathematics. In the standardization of the test, u= 60 with o=10.
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